William w



FllS

QQ 19m-aaa W. W. CROOSER.

`Pammu July 10. 181%'.

INvEN'ron:

UNITED STATES PATENT Omen WILLIAM W. OBOOKER, 0F WAUKBGH, ILLISOIS.

IMPROVEMENT iN FIREEXTINGUIBHER.

Specication forming part of Lettera Patent No. Inu. dated July l0, 1977iPPI-W m June 16. 1877.

To rll whom it may concern:

Bt it known that I lWILLIAM W. Caooxsa, of the city of Waukegan, in thecounty of Lake and State of Illinois,I have invented a new and improvedmethod applying carbonicacid or other extinguishing gas to lires for thepurpose of putt-ing them out; and I hereby declare the following to be afull, clear, and exact description thereof, reference being had to theaccompanying drawing, of which- Figure 1 is a perspective view of a formof apparatus designed to carry my method into e'ect.

It is well known that much of the damage resulting from tires is causedby the water employed in extinguishing them. Sometimes this is almostthe only damage done, and is very serious, even where the liquid is usedin comparatively small quantities, as in many chemical tireextinguhers`rThe object of my invention is to overcome this diiculty by extinguishingres without the employment of liquids of any sort, but by means ofaerit'orm fluids only, and these in a perfectly dry state.

My invention consists in making ordinary atmospheric air the vehicle forconveying the extinguishing gas to the desired point; and this is doneby having a tube from the gasreservoir enter a hose-pipe, or any othercon duit, through which a strong current of air is forced by means of asuitable fan, blower, or air-pump, preferably driven by steam.

Referring-to the drawing, A. is a carbonicacid gas holder, provided iuthe ordinary manner with a gage, to indicate the pressure. A suitablenumber of such gas-holders, previously charged, should be held inreadiness. iu order that as soon as one is exhausted another mayimmediately be substituted. B is an nir-pump, adapted to force apowerful blast through the pipe C. At the point p a pipe, D, from thegas-reservoir enters the pipe C, which latter is analogous to thehose-pipe in all extinguishers.

Experience may suggest other and better forms of apparatus thun thatshown, and which l have just described, for the carrying ont of myinvention; but. this form answers its purpose satisfactorily', and is asgood as any other at present known to me. O1 coarse, if anyextinguishinggas other than esrbouic acid is used, certain parts mayhave tn he modified accordingly; but this does not ao my invention,whichrelates only to the method of applying the gas to the tire.

The operation is as follows: Carbonio-acid gas is allowed, by opening asuitable stopcock, s, to escape from the reservoir through the pipe 1),whence it passes into the pipe G, which may be of any required length,and to tnt 'md of which a suitable nozzle may be attached. At the sametime the airpmnp is set in action, causing a blast ot' air to passthrough the pipe U. At the point p the air and gas commingle, andthencet'orward pass along together, .the pressure of the carbonioacidgas (which is, of course, greatest when the gas is first released) beingso regulated bythe stopcock as to be subordinate'in .orco to the currentof air. This current of diluted carbonio-acid gas is directed upon thetire, when the latter is speedily extinguished.

It is true the oxygen of the current of air has a tendency to supportcombustion; and the very general knowledge ot' this factno doubt, hasprevented my method from ever being hitherto attempted by others; but,inreality, the volume of oxygen is so small compared with the unitedvolumes of the nitrcgen and carbonio-acid gas that it becomesiusiguicnnt, and its powers are wholly' ueutralized.

It is also true that carbonio-acid gas might serve even more e'ectivelyalone; but it is weil known that to produce it in requisite quantitiesto give the necessary pressure for a sutlicient length of time is bothtoo diilicult and too expensive to be practicable. This hns led to itsdilution, ordinarily with. water, productive of the undesirable resultsabove referred to. By employing a blast of air as the carryingqmwer, inthe manner l have described, n strong, steady, aud uniform tiow maybecreated and maintained indelinitely without any needless expenditure ofgas.

l make no claim to the apparatus which l have described, for l am awarethat it is old, and is used for many purposes analogous to this; but

Whst I doelnimand desire te neeuxeby toned thump s nibble enduit. .hda-M'rtfnptxfxifa bear li In.;

e met erein eecri e app y ng carbonio-seid or other extinguishing gu toma w 0mm mee for the purpose of annihilating the mme, In preeeneeofwhich consists in conveying auch gal to the H. V. Tom, 'desired pointby menne of a current of air Wl. Mmmm.

